CN106785944B - A kind of three-phase coenosarc rigid gas insulated power circuit - Google Patents
A kind of three-phase coenosarc rigid gas insulated power circuit Download PDFInfo
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- CN106785944B CN106785944B CN201611140928.5A CN201611140928A CN106785944B CN 106785944 B CN106785944 B CN 106785944B CN 201611140928 A CN201611140928 A CN 201611140928A CN 106785944 B CN106785944 B CN 106785944B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/20—Bus-bar or other wiring layouts, e.g. in cubicles, in switchyards
- H02B1/202—Cable lay-outs
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G5/00—Installations of bus-bars
- H02G5/06—Totally-enclosed installations, e.g. in metal casings
- H02G5/063—Totally-enclosed installations, e.g. in metal casings filled with oil or gas
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Gas-Insulated Switchgears (AREA)
- Installation Of Bus-Bars (AREA)
Abstract
The present invention relates to a kind of three-phase coenosarc rigid gas insulated power circuits, including straight section unit (2) and corner units；Each unit enclosure interior fills insulating gas, the shell of each unit passes through flanged joint, the conductor of each unit passes through fingertip grafting, corner units (3) include short section shell (34) and long piece housing (35), and fixed insulated support (36) and sliding insulated support (37) are equipped in long piece housing (35).The configuration of the present invention is simple is reliable, component standard, is applicable in various lines design scheme, flexible arrangement.It is adjusted and is arranged according to different installation environments, ease of assembly construction is compact-sized to occupy little space.
Description
Technical Field
The invention relates to the technical field of high-voltage power transmission, in particular to a three-phase integrated rigid gas-insulated power transmission line.
Background
A rigid gas insulated transmission line (GIL) is a transmission device which is formed by insulating gas with certain pressure, a transmission unit providing a current channel and other insulating components, wherein the insulating gas is sealed in a metal pipeline.
The GIL has high reliability, long service life and transmission energy as a large-capacity, high-voltage and long-distance power transmission lineStrong force and the like. GIL is a metal rigid closed structure, is little influenced by external atmosphere and environment, and also has no influence of external magnetic field. Internal use of SF6Or SF6And N2The mixed gas or compressed air is used as an insulating medium, so that the insulating property is good, the dielectric loss is low, the aging problem is avoided, the flammability is avoided, and the reliability is extremely high. The average lifetime of GIL is over 50 years. At present, the transmission power of the GIL can reach 4GW, and the transmission capacity is strong. The number of power transmission loops is reduced. And a compact closed structure is adopted, so that the occupied area is smaller than that of an overhead line. The arrangement mode is flexible, the system wiring can be simplified, and the power supply reliability of the whole system is improved.
GIL often encounters multiple placement scenarios in engineering design: the angle is many, adds the current branch road, installs test equipment additional or introduces other auxiliary detection unit and needs to increase the interface, and the power transmission line is divided into two times by one return circuit, uses three-phase altogether structure and overhead line, GIS equipment, transformer equipment and cable butt joint, and long line thermal deformation is big etc. a great deal of technical problem. In corridor locations with small line space, rigid gas insulated transmission lines (GIL) occupy a large space.
The change in GIL bus orientation requires a corner segment to complete. Currently, GIL is implemented for non-90 ° quarter turns with castings or two quarter splices. By using the casting elbow and the two right-angle splicing, the deformation caused by thermal expansion and cold contraction in the operation of equipment can not be absorbed in a circuit, a special thermal compensation device needs to be added, and the structure is complex. And the thermal compensation device has large investment, short service life and poor reliability, and seriously influences the safe operation of the whole bus.
Disclosure of Invention
In order to solve the problems, reduce the cost and improve the flexibility of the line arrangement, the invention provides a multi-unit combined three-phase common rigid gas insulated transmission line. The specific scheme is as follows:
a three-phase integrated rigid gas insulated transmission line comprises n straight section units, wherein each straight section unit comprises a shell filled with insulating gas and three straight conductors arranged in the shell, n is not less than 1, the three straight conductors also comprise m corner units used for changing the direction of the transmission line, each corner unit comprises a short section shell, a long section shell and three corner conductors, and m is not less than 1; wherein,
an opening plane at one end of the short-section shell or the long-section shell is inclined to the shell axis, and the opening planes of the short-section shell and the long-section shell inclined to the shell axis are adjacent and fixedly connected, so that an included angle is formed between the shell axes of the long-section shell and the short-section shell;
each corner conductor is a conductor with an axis with a bending angle and is arranged in the short-section shell and the long-section shell, and the axis bending angle of each corner conductor is the same as the included angle of the axes of the long-section shell and the short-section shell;
the n straight section units are connected with the m corner units in pairs through flanges, and conductors in each unit are spliced in pairs through contact fingers.
Furthermore, a fixed insulating support piece and a sliding insulating support piece are arranged in the long-section shell, wherein the fixed insulating support piece is close to a corner, and flanges are arranged at two ends of each corner unit and are connected with adjacent units; the corner conductor is installed in the short-section shell and the long-section shell through the fixed insulating support and the sliding insulating support.
Further, the included angle between the axial lines of the long-section shell and the short-section shell of the corner unit is 90-179 degrees.
Furthermore, the opening planes of the long-section shell and the short-section shell of the corner unit, which are inclined to the axis of the shell, are connected through plug welding, and an operation hole is formed in the joint.
The device comprises a power transmission line, a plurality of T-shaped units, a plurality of compensation units and a plurality of T-shaped units, wherein the power transmission line is divided into three branches to be connected with other equipment, the T-shaped units are used for adding current branches into the power transmission line, installing test equipment or introducing other auxiliary units, the b branch units are used for enabling the power transmission line to be divided into three branches to be connected with other equipment, the c compensation units are used for compensating the thermal expansion change of a straight-line section of the power transmission line to achieve line compensation deflection, a is larger than or equal to 0, b is larger than or equal to 0, c is larger than or equal to.
Further, the device comprises an airtight insulating support, wherein the airtight insulating support is arranged on the flanges of two adjacent units or at the opening of the units and is used for installing a conductor.
In the invention, the flexible corner unit is designed, and the required corner section angle can be selected according to the angle required by the line, so that the GIL line is more flexibly designed. Meanwhile, the corner unit has larger flexibility, and can allow the angle change to be +/-1.5 degrees, so that expansion with heat and contraction with cold and other errors of the line can be absorbed.
The invention has the beneficial effects that:
1. the invention has simple and reliable structure, standard components, suitability for various circuit design schemes and flexible arrangement. The arrangement is adjusted according to different installation environments, the assembly and construction are convenient, the structure is compact, and the occupied space is small.
2. The corner unit of the invention has larger flexibility by adopting the plug welding, can allow the angle to change by +/-1.5 degrees, adopts the flexible design at the turning position, can realize the deformation of a small angle through the splicing welding structure of the shell, and absorbs the error and the deformation in a circuit.
3. The invention can reduce the number of flange connections, the number of airtight insulating supports, the number of sealing surfaces and the removal of thermal compensation devices. The leakage probability is reduced, the reliability of line operation is improved, the construction cost is saved, and the construction scheme of the project is optimized.
Drawings
FIG. 1 is a schematic view of example 2 of the present invention;
FIG. 2 is a schematic view of example 3 of the present invention;
FIG. 3 is a schematic view of inventive example 4;
fig. 4 is a schematic diagram of the insertion connection of a fixed contact and a movable contact;
FIG. 5 is a schematic view of a corner unit;
FIG. 6 is a schematic view of a T-shaped cell;
FIG. 7 is a schematic diagram of a branching unit;
FIG. 8 is a schematic view of a compensation unit;
FIG. 9 is a schematic view of a straight section unit;
fig. 10 is a schematic view of embodiment 1 of the present invention.
Detailed Description
The detailed description of the embodiments of the present invention, which is provided in connection with the accompanying drawings, is for the purpose of facilitating the clear understanding of the present invention and is not intended to limit the present invention
A three-phase integrated rigid gas insulated transmission line is applicable to 66kV to 330 kV.
Example 1:
as shown in fig. 10, the three-phase integrated rigid gas-insulated transmission line comprises straight-section units 2 and corner units 3, wherein each straight-section unit 2 comprises a shell filled with insulating gas and three straight conductors arranged inside the shell. The corner unit 3 includes a short-length housing 34, a long-length housing 35, and three corner conductors 32. The number of the straight section units and the number of the corner units are determined according to construction requirements, and the number and the arrangement sequence of the combination can be determined according to the terrain paved by the power transmission line or the requirement of adding ports by a plurality of straight section units and corner units. Namely, n (n is more than or equal to 1) straight section units and m (m is more than or equal to 1) corner units can be arranged, and in use, the n straight section units 2 and the m corner units 3 are connected in pairs through flanges. The corner unit is used for changing the direction of the power transmission line, and the straight section unit is a basic unit in the power transmission line. The opening planes of the long-section shell 35 and the short-section shell 34 of the corner unit 3, which are inclined to the shell axis, are connected by means of plug welding, and the connection position is provided with an operation hole.
As shown in fig. 5, an opening plane at one end of the short-section shell 34 or the long-section shell 35 is inclined to the shell axis, and the short-section shell 34 and the long-section shell 35 are adjacent to and fixedly connected with the opening plane inclined to the shell axis, so that the shell axes of the long-section shell and the short-section shell form an included angle. The included angle of the axial lines of the long-section shell and the short-section shell is 90-179 degrees.
Each corner conductor 32 is a conductor with an axis having a bending angle, and is installed in the short-section shell 34 and the long-section shell 35, and the axis bending angle of the corner conductor is the same as the included angle of the axis of the long-section shell and the short-section shell.
A fixed insulating support 36 and a sliding insulating support 37 are arranged in the long-section shell 35, wherein the fixed insulating support 36 is close to a corner, and flanges are arranged at two ends of the corner unit 3 and are connected with adjacent units; the corner conductor 32 is mounted in the short-section housing 34 and the long-section housing 35 via a fixed insulating support 36 and a sliding insulating support 37
As shown in fig. 9, the straight section unit 2 is a basic unit of a three-phase integrated rigid gas insulated power transmission line, and includes a straight casing 21, straight conductors 22 (only two phase conductors are visible in fig. 9 due to the angle, and three phase conductors are shown in this embodiment) and three phase supporting insulators 26. The straight shell is made of a formed pipe, a coiled welded pipe, a spiral welded pipe, a bent welded pipe or a friction stir welded pipe. The straight conductors are installed inside the straight shell and are inserted into the adjacent unit conductors. The straight conductor is fixed inside the straight shell through the three-phase supporting insulator, the three-phase supporting insulator is fixedly connected or connected with the straight shell in a sliding mode, two three-phase supporting insulators are arranged inside one straight section unit, and the three-phase supporting insulators are welded with the straight conductor through bolts or bolts and connected in a compression joint mode.
The three-phase integrated rigid gas-insulated transmission line can also comprise a branch unit. As shown in fig. 7, the branching unit 1 includes a gas-tight insulating support 11 mounted on an opening of the branching housing, a branching housing 12 with a flange, and conductors (only two-phase conductors are visible in fig. 7 for reasons of angle, but three-phase conductors are present) mounted in the branching unit, the gas-tight insulating support being connected to the conductors. The branch housing comprises a main housing and three branch housings 13 communicating with the main housing, the branch housings being open at their outer ends and being at an angle, typically 90, to the main housing. The branch unit divides the three-phase bus unit into three branches to be connected with other equipment. The three branches can be connected with a single-phase bus, so that the test, operation and troubleshooting of different branches are facilitated, the occupied area is greatly reduced, and the installation is more flexible and reliable.
The branch conductors in the branch unit comprise straight conductors and bent conductors; the straight conductors are mounted in the main housing and the bent conductors are at an angle to the axis which is the same as the angle of the main housing to the axis of the branch housing, typically 90 deg., and the bent conductors are mounted in the branch housings. The branch shell can be distributed in parallel along the axial direction of the main shell, and can also be distributed on the same radial section of the main shell.
And the branch unit is used for branching the three-phase integrated GIL into a single-phase GIL, and is conveniently connected with overhead lines, GIS equipment, transformers and other equipment. Or dividing one-time triphase integration GIL into: a single phase GIL and a three phase integrated GIL, and when these demands are not met, the opening of the branch shell is sealed by a cover plate.
As shown in fig. 4, two ends of the conductor in each unit of the power transmission line are respectively provided with a contact, and the two contacts are connected with each other through the contacts. One end of the conductor is a static contact 33 which is spliced with a moving contact of an adjacent unit conductor through a contact finger 31; the other end is a movable contact 33' which is inserted with the fixed contact of the adjacent unit conductor through the contact finger 31.
The three-phase integrated rigid gas-insulated transmission line can further comprise a compensation unit. The compensation unit is used for compensating the thermal expansion change of the straight line section of the power transmission line and realizing line compensation deflection. As shown in fig. 8, the compensation unit 4 is disposed at a corner portion perpendicular to the compensation line, and includes a middle housing 42, two flanged bellows 41, a short-flow sheet 43, a limiting sheet 44, and a conductor, wherein two ends of the middle housing 42 are respectively fixedly mounted with one bellows 41, and the bellows 41 is fixedly mounted with the short-flow sheet 43 and the limiting sheet 44.
The three-phase integrated rigid gas insulated transmission line can also comprise a T-shaped unit. The T-shaped unit is used for adding a current branch circuit, installing test equipment or introducing other auxiliary units into the power transmission line. As shown in fig. 6, the T-shaped unit 5 includes a T-shaped housing 52 and a conductor. The T-shaped housing includes an upper port 53, a left port 54 and a right port 55, with a gas-tight insulating support mounted on the ports and conductors mounted on the gas-tight insulating support.
And the airtight insulating supports are arranged on the flanges of the two adjacent units or at the openings of the units and used for installing conductors and ensuring the airtightness of the power transmission line.
Each unit selects different units and any number of combinations according to the circuit layout. That is to say, the three-phase integrated rigid gas-insulated transmission line of the present invention may further include, in addition to the straight section unit and the corner unit, a T-shaped units 5 for adding current branches to the transmission line, installing test equipment, or introducing other auxiliary units, b branch units 1 for dividing three branches of the transmission line to connect other equipment, and c compensation units 4 for compensating for thermal expansion changes of the straight section of the transmission line to achieve line compensation deflection, wherein a is greater than or equal to 0, b is greater than or equal to 0, c is greater than or equal to 0, insulating gas is filled in the shells of the units, the shells of the units are connected by flanges, and conductors in the units are connected by plugging.
Example 2:
as shown in fig. 1, a three-phase integrated rigid gas-insulated transmission line includes a straight unit 2, a branch unit 1, a corner unit 3, a compensation unit 4 and a T-shaped unit 5. The right port 55 of the T-shaped unit 5 is connected with one end of the compensation unit 4, the other end of the compensation unit 4 is connected with the short section shell 34 of the corner unit 3, the long section shell 35 is connected with one end of the straight section unit 2, and the other end of the straight section unit 2 is connected with the branch unit 3. Insulating gas is filled in the unit shells, the unit shells are connected through flanges, and conductors in the units are connected in an inserting mode.
Example 3:
as shown in fig. 2, a three-phase integrated rigid gas-insulated transmission line includes two straight-section units 2, a corner unit 3, a branch unit 1, a compensation unit 4 and a T-shaped unit 5. The compensation unit 4 is connected at one end to the left port 54 and at the other end to the short section housing 34 of the corner unit 3. The inclined included angle between the opening plane at one end of the short-section shell or the long-section shell of the corner unit and the axis of the shell is 60 degrees, the included angle between the axes of the short-section shell and the long-section shell forming the corner unit is 120 degrees, and other angles can be set according to the requirement. The long-section shell 35 of the corner unit 3 is sequentially connected with the two straight-section units 2 and then connected with the branch unit 1. The inside of each cell is filled with an insulating gas.
Example 4:
as shown in fig. 3, a three-phase integrated rigid gas insulated power transmission line includes four straight section units 2, a corner unit 3, a compensation unit 4 and a T-shaped unit 5. The inclined included angle between the opening plane at one end of the short-section shell or the long-section shell of the corner unit and the axis of the shell is 45 degrees, and the included angle between the axes of the short-section shell and the long-section shell forming the corner unit is 90 degrees. The two straight section units 2 are connected in sequence and then connected with the upper port 53 of the T-shaped unit 5, one end of the compensation unit is connected with the left port 54 of the T-shaped unit, the other end of the compensation unit is connected with the short section shell 34 of the corner unit 3, and the long section shell 35 of the corner unit is connected with the two straight section units which are connected in sequence. Insulating gas is filled in each unit, and the deflection angle of the corner unit is 90 degrees.
The three-phase integrated rigid gas insulated transmission line has the advantages of simple and reliable structure, standard components, suitability for various line design schemes and flexible arrangement. The arrangement is adjusted according to different installation environments, the assembly and construction are convenient, the structure is compact, and the occupied space is small.
Claims (5)
1. A three-phase integrated rigid gas-insulated transmission line comprises n straight section units (2), wherein each straight section unit (2) comprises a shell filled with insulating gas and three straight conductors arranged in the shell, n is not less than 1, the three-phase integrated rigid gas-insulated transmission line is characterized by further comprising m corner units (3) used for changing the direction of the transmission line, each corner unit (3) comprises a short section shell (34), a long section shell (35) and three corner conductors (32), and m is not less than 1; wherein,
an opening plane at one end of the short-section shell (34) and/or the long-section shell (35) is inclined to the shell axis, and the opening planes of the short-section shell (34) and the long-section shell (35) inclined to the shell axis are adjacent and fixedly connected, so that the shell axes of the long-section shell and the short-section shell form an included angle;
each corner conductor (32) is a conductor with an axis with a bending angle, and is installed in the short-section shell (34) and the long-section shell (35), and the axis bending angle of each corner conductor is the same as the included angle of the axis of the long-section shell and the axis of the short-section shell; the n straight section units (2) are connected with the m corner units (3) in pairs through flanges, and conductors in each unit are inserted in pairs through contact fingers;
the test device is characterized by further comprising a T-shaped units (5) used for adding current branches, installing test equipment or introducing other auxiliary units into the power transmission line, wherein each T-shaped unit (5) comprises a T-shaped shell (52) and a conductor, each T-shaped shell comprises an upper port (53), a left port (54) and a right port (55), an airtight insulating support is installed on each port, and each conductor is installed on each airtight insulating support; the b branch units (1) are used for enabling the power transmission line to be divided into three branches to be connected with other equipment, and each branch unit (1) comprises an airtight insulating support (11), a branch shell (12) with a flange and a conductor installed in the branch unit; the c compensation units (4) are used for compensating the thermal expansion change of the straight line section of the power transmission line so as to realize line compensation deflection, and each compensation unit (4) comprises a middle shell (42), two corrugated pipes (41) with flanges, a short current sheet (43), a limiting sheet (44) and a conductor; the unit comprises a plurality of unit shells, a conductor, a insulating gas, a flange and a conductor, wherein a is not less than 0, b is not less than 0, c is not less than 0, the unit shells are filled with the insulating gas, the unit shells are connected through the flange, and the conductors in the units are connected through inserting.
2. The three-phase integrated rigid gas insulated transmission line according to claim 1, characterized in that the long section of the housing (35) is provided with a fixed insulating support (36) and a sliding insulating support (37), wherein the fixed insulating support (36) is close to a corner, and two ends of a corner unit (3) are provided with flanges connected with adjacent units; the corner conductor (32) is installed in the short-section housing (34) and the long-section housing (35) through the fixed insulating support (36) and the sliding insulating support (37).
3. The three-phase integrated rigid gas insulated transmission line according to claim 2, characterized in that the housing axis angle of the long-section housing (35) and the short-section housing (34) of the corner unit (3) is 90 ° to 179 °.
4. The three-phase integrated rigid gas insulated transmission line according to claim 1, characterized in that the open planes of the long-section housing (35) and the short-section housing (34) of the corner unit (3) inclined to the housing axis are connected by means of plug welding, and the connection is provided with an operation hole.
5. A three-phase integrated rigid gas-insulated power transmission line according to any of claims 1-4, characterized by comprising gas-tight insulating supports (11) mounted on the flanges of two adjacent units or at the openings of the units for mounting conductors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611140928.5A CN106785944B (en) | 2016-12-12 | 2016-12-12 | A kind of three-phase coenosarc rigid gas insulated power circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611140928.5A CN106785944B (en) | 2016-12-12 | 2016-12-12 | A kind of three-phase coenosarc rigid gas insulated power circuit |
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| CN106785944A CN106785944A (en) | 2017-05-31 |
| CN106785944B true CN106785944B (en) | 2018-10-19 |
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| CN117096813A (en) * | 2022-05-12 | 2023-11-21 | 日立能源瑞士股份公司 | Bending units and gas insulated transmission lines |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203165635U (en) * | 2012-12-28 | 2013-08-28 | 浙江省电力设计院 | GIL (gas insulated metal enclosed transmission line) straight connecting line adopted by high-low voltage side of transformer |
| CN203026893U (en) * | 2012-12-29 | 2013-06-26 | 重庆博森电气（集团）有限公司 | Outlet unit of rigid gas insulated transmission line |
| FR3010583A1 (en) * | 2013-09-09 | 2015-03-13 | Alstom Technology Ltd | MONOPHASE CONDUCTOR MODULE AND SINGLE PHASE CONDUCTOR JUNCTION EQUIPPED WITH SAME |
| CN106129823A (en) * | 2016-06-21 | 2016-11-16 | 中国电力科学研究院 | Extra-high-voltage alternating current mixed gas GIL line segment and method for arranging |
| CN206211278U (en) * | 2016-12-12 | 2017-05-31 | 江苏安靠智能输电工程科技股份有限公司 | A kind of three-phase coenosarc rigid gas insulated power circuit |
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